After conducting their own week-long inquiry into that game at Dairy Farmers Stadium on August 21, the NRL referred information gleaned to NSW Police last Wednesday.

It was reported in a Sydney newspaper yesterday that betting irregularities in another six matches had raised suspicion, and NSW State Crime Command detectives had established a dedicated strike force to investigate NRL betting activity.

Burraston and TAB Sportsbet media manager Glenn Munsie said they were unaware of any police investigation into any game other than the Cowboys-Bulldogs match in Townsville.

"There is nothing that I'm aware of relating to our games, and certainly there's no more than the one investigation that I'm aware of," Burraston said.

"I have spoken to [NRL chief executive] David Gallop, and he tells me he's not aware of anything other than the one investigation that everybody is aware of, so I'm not sure how this story has emanated."

Munsie said the NRL had not requested any information from his organisation about any game other than the one between the Cowboys and Bulldogs, in which 95 per cent of bets on the first scoring option was unsuccessfully wagered on a Cowboys penalty goal.

"We have not been asked by the NRL to provide any information on any matches apart from the game between the Cowboys and the Bulldogs three weeks ago," Munsie said.

Meanwhile, Burraston said players were well behaved at their modified Mad Monday function held behind locked gates at the Newcastle International Paceway at Broadmeadow on Monday.

"We tried to keep it very different to previous years, in that we put a function on and we supervised that function," Burraston said.

"I think the important thing that people need to understand is we've come a long way in the last 12 months, and it is a credit to our players and our staff.

"We've gone away from that traditional 1970s Mad Monday, what they used to be back then, to providing a function where the players and staff could get together and have a drink away from everybody else and not do any of the silly things that may or may not have gone on on other occasions."